TPS3702 High accuracy window voltage detector for overvoltage & undervoltage monitoring | TI.com

TPS3702 (ACTIVE)

High accuracy window voltage detector for overvoltage & undervoltage monitoring

 

Description

The TPS3702 is an integrated overvoltage and undervoltage window detector in a small SOT-6 package. This highly accuracy voltage monitor is ideal for systems that operate on low-voltage supply rails and have narrow margin supply tolerances. Low threshold hysteresis options of 0.55% and 1.0% prevent false reset signals when the monitored voltage supply is in its normal range of operation. Internal glitch immunity and noise filters further eliminate false resets resulting from erroneous signals.

The TPS3702 does not require any external resistors for setting overvoltage and undervoltage reset thresholds, which further increases overall accuracy and reduces solution size and cost. The SET pin is used to select between the two available threshold voltages designed into each device. A separate SENSE input pin and VDD pin allow for the redundancy sought by safety-critical and high-reliability systems. This device also features independent reset outputs for the OV and UV pins; as a result of the open-drain configuration, UV and OV can be tied together.

This device has a low typical quiescent current specification of 7 µA and is qualified for use over the industrial temperature range of –40°C to 125°C.

Features

  • Input Voltage Range: 2 V to 18 V
  • High Threshold Accuracy:
    • 0.25% (typ)
    • 0.9% (–40°C to 125°C)
  • Fixed Window Thresholds Optimized for Nominal Rails Between 1 V and 5 V
  • Open-Drain Outputs for Overvoltage and Undervoltage Indication
  • Internal Glitch Immunity
  • Threshold Adjust Using the SET Pin
  • Low Quiescent Current: 7 µA (typ)
  • Internal Threshold Hysteresis: 0.55%, 1.0%
  • SOT-6 Package

Parametrics

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Part number Order Threshold voltage 1 (Typ) (V) Number of supplies monitored VCC (Max) (V) VCC (Min) (V) Output driver type/reset output Time delay (ms) Features Rating Operating temperature range (C) Watchdog timer WDI (sec)
TPS3702 Order now 1
1.2
1.8
3.3
5    
1     18     2     Active-low
Open-drain    
0     Undervoltage and overvoltage monitor
Wide input voltage
Dual output    
Catalog     -40 to 125     None    
TPS3430 Order now   1     6.5     1.6     Active-low
Open-drain    
Programmable     Watchdog timer
Window watchdog
Watchdog disable    
Catalog     -40 to 125     Programmable    
TPS3430-Q1 Order now   1     6.5     1.6     Active-low
Open-drain    
Programmable     Watchdog timer
Window watchdog
Watchdog disable    
Automotive     -40 to 125     Programmable    
TPS3431 Order now   1     6.5     1.8     Active-low
Open-drain    
200     Watchdog timer
Watchdog disable
Active-low enable    
Catalog     -40 to 125     Programmable    
TPS3431-Q1 Order now   1     6.5     1.8     Active-low
Open-drain    
200     Watchdog timer
Watchdog disable
Active-low enable    
Automotive     -40 to 125     Programmable    
TPS3700 Order now Adjustable     1
2    
18     1.8     Active-low
Open-drain    
0     Undervoltage and overvoltage monitor
Wide input voltage
Dual output    
Catalog     -40 to 125     None    
TPS3700-Q1 Order now Adjustable     1
2    
18     1.8     Active-low
Open-drain    
0     Undervoltage and overvoltage monitor
Wide input voltage
Dual output    
Automotive     -40 to 125     None    
TPS3701 Order now Adjustable     1
2    
36     1.8     Active-low
Open-drain    
0     Undervoltage and overvoltage monitor
Wide input voltage
Dual output